#!/bin/sh
#
# Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

echo "P 15"
echo "Enter password:"
read -r ptype len
case "$ptype" in
  p)
    # Trick: reading len+1 characters get the password and the terminating
    # newline - just what we need here.
    if head -c "$((len+1))" |\
        @path_to_pamtester@ @pam_service_name@ "$USER" authenticate \
          >/dev/null 2>&1; then
      echo "i 11"
      echo "I know you."
      exit 0
    else
      echo "e 17"
      echo "Invalid password."
      exit 1
    fi
    ;;
  x)
    exit 1
    ;;
  *)
    echo >&2 "Unexpected packet type."
    exit 1
    ;;
esac

# Shouldn't get here.
exit 42
